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Finding the Fourth Proportional to 198.18, 273.50 and 148.97

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Solution

The fourth proportional to 198.18, 273.50 and 148.97 is: 205.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    198.18 : 273.50 = 148.97 : x
  2. Step 2: Convert to fraction form
    198.18/273.50 = 148.97/x
  3. Step 3: Cross multiply
    198.18x = 273.50 × 148.97
  4. Step 4: Simplify right side
    198.18x = 40,743.30
  5. Step 5: Solve for x
    x = 40,743.30/198.18
  6. Step 6: Final answer
    x = 205.59

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.